Grouting sleeve for steel bar connection

Abstract

The invention discloses a grouting sleeve for steel bar connection, which comprises a sleeve body, wherein a grouting opening is formed at one end of the sleeve body; a grout outlet is formed at the other end of the sleeve body. The grouting sleeve is characterized in that the sleeve body is made of a seamless steel pipe; two or more riflings are arranged on an inner wall of the sleeve body; convex rifling ribs and concave rifling grooves are formed on the inner wall of the sleeve body; spacings between the adjacent rifling ribs are equal. The grouting sleeve takes the seamless steel pipe as a raw material, and the two or more riflings are arranged on an inner wall of the steel pipe, so that the tensile capacity, the shear capacity and the compressive capacity of the sleeve are good; the full-grouting or semi-grouting sleeve is manufactured according to different requirements, so that the sleeve is simple in structure and convenient to process and manufacture, and avoids the defects of high production waste, high pollution and high cost of the existing grouting sleeve.

Description

[0001] 【Technical field】 [0002] The invention relates to a grouting sleeve for steel bar connection. [0003] 【Background technique】 [0004] Most of the grouting sleeves used in the prior art are in the form of casting, and the inner wall of the grouting sleeve used forms a related inner cavity structure that determines the tensile, compressive, and shearing capabilities of the sleeve. The restraint mechanism and strain distribution of the sleeve have a significant impact. The strain distribution of the sleeve corresponds to the structure of the inner cavity, and shows different laws in the smooth section and the deformed section; the restraint of the sleeve on the grouting material is mainly from the mutual extrusion of the protruding ring ribs on the inner wall. The vertical component of the force, the constraint of the smooth section on the grouting material depends on the size of the splitting deformation of the grouting material. Therefore, when designing and processin...

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Problems solved by technology

Therefore, when designing and processing, it is necessary to process multiple convex ribs on the inner wall of the sleeve. When processing the semi-grouting sleeve, it is also necessary to process an excessive wire lap joint for the sleeve, which is made of ductile iron. The material needs to be formulated. When the quality of the raw material is unstable, the formula needs to be adjusted to meet the mechanical performance requirements of the product. The formula adjustment process before production is long. Although the production process cost is low, the price of the ductile iron material is relatively expensive. In the grouting sleeve for steel bars, the product uses many materials, is expensive, and is not economical

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